litchfield



G.LITCHFIELD,J1-.

MACHINE FOR BENDING RINGS AND TUBE COUPLINGS.

No. 175,120, Patented March 21,1876.

WITNESSES ivw g ATTORNEYS N-PETERS. PHOTG-UTHDGRAPHER, WASHINGTON. D C

" d vehement ZOWIMY there ube ow. e mine; j in an inclined position Jgu'ide-box G, above the 6313116 cutting-edger! 'hfth,v utting-edge; d of. a horizontal feed- The low'er guideboxes-O; each contain a beHder e, the operative end of which is beveled and concaved, as shown at e, the concavi- "ties of benders -andfforming die whleing sufficient'tolembrace themandrel'. Die aj and f-cansje the bender a to pressthemetal artl yz-i 'o'rmed annulus on, the "ma ach' sid enthe'reo and ngjone end of {the niahdrel is,arranged; a forming-die a," havingla semicircular rece s, i b;'in itslowei endfa this die hasbyl sside;

,theannulus is shaped out. trodiisrelcased hy the rotationiofii't V will-springoutward from the in drelgunder n the other eudofthe aid box, abutting-shit, wh s-adenit d-fe be thrownby the rec procation of p the tithe-Q tab1e; D', rigidly secured to the frame "at one i sideof the niandrel 'assho'wn in'Figgl." 3

"cutting-bit c .are actuatedhya segmentel cam," "f, applied upon the shaft f" of a gear-wheel, E,

"lielowr which latter also intei l v g-jwheels G G, by means.of. w

ual

nsequ'ently to the cams Thcfcur d QtheQupper-cam will he brought "forcibly "iagainstthe upper endof rungmnbgc using its edge tocu't the bar of metalthfr' ugliythc uppercam, continuing its movement,-

ill then r I 'Yerthe- 1nandrel,forlning by this inean'sfoneihalf'of egringn; Bender. a willrigidly lholdz'the rel until,

vt the successive action of can;

1 1wer--benders e e, the reinaining p'rtioh of en r- As eac the reactive influence of a spring;jS;"recessed ":i-ntothe said benders, which 'h'adi ibeen compressed by their forward niowjirnen'tr The nonient the bender-rods are-F'retracted the ring is thrown oif the mandrel ,by l neansofa i springestripper, J, the upper bifurcated end of which straddles the mandreli -lr fThisstrip-l per, is actuated by means of-an-xendwise inovable rodl, K, passing through the" fra n1e with one end abutting against 'the saidstripper, and a cam, l, rigidly secured to the gear- --whee1' H, in a position such that at eachrevolution thereof the cam shall thrust the rod against thestripper, with the res'ultahove described.

terlockipgwith the main opera ng heelF;

above it;an( 1-with two communic' d n nis icominunicated to whee H ar 'nge'd" l-k iown form,which are eccent cally keyed onit-he-iendsvof the shafts h ot'ifgear wheels" 

